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chromium/third_party/blink/web_tests/fast/events/constructors/hash-change-event-constructor.html 

<!DOCTYPE html>
<html>
<head>
<script src="../../../resources/js-test.js"></script>
</head>
<body>
<script>

description("This tests the constructor for the HashChangeEvent DOM class.");

// No initializer is passed.
shouldBe("new HashChangeEvent('eventType').bubbles", "false");
shouldBe("new HashChangeEvent('eventType').cancelable", "false");
shouldBeEqualToString("new HashChangeEvent('eventType').oldURL", "");
shouldBeEqualToString("new HashChangeEvent('eventType').newURL", "");

// bubbles is passed.
shouldBe("new HashChangeEvent('eventType', { bubbles: false }).bubbles", "false");
shouldBe("new HashChangeEvent('eventType', { bubbles: true }).bubbles", "true");

// cancelable is passed.
shouldBe("new HashChangeEvent('eventType', { cancelable: false }).cancelable", "false");
shouldBe("new HashChangeEvent('eventType', { cancelable: true }).cancelable", "true");

// oldURL or newURL is passed.
["oldURL", "newURL"].forEach(function (attr) {
    // Strings.
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": 'doremi' })." + attr, "doremi");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": '' })." + attr, "");

    // Non-strings.
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": undefined })." + attr, "");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": null })." + attr, "null");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": false })." + attr, "false");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": true })." + attr, "true");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": 12345 })." + attr, "12345");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": 18446744073709551615 })." + attr, "18446744073709552000");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": NaN })." + attr, "NaN");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": [] })." + attr, "");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": [1, 2, 3] })." + attr, "1,2,3");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": {doremi: 12345} })." + attr, "[object Object]");
    shouldBeEqualToString("new HashChangeEvent('eventType', { " + attr + ": {valueOf: function () { return 'doremi'; } } })." + attr, "[object Object]");
});

// All initializers are passed.
shouldBe("new HashChangeEvent('eventType', { bubbles: true, cancelable: true, oldURL: 'doremi', newURL: 'andre' }).bubbles", "true");
shouldBe("new HashChangeEvent('eventType', { bubbles: true, cancelable: true, oldURL: 'doremi', newURL: 'andre' }).cancelable", "true");
shouldBeEqualToString("new HashChangeEvent('eventType', { bubbles: true, cancelable: true, oldURL: 'doremi', newURL: 'andre' }).oldURL", "doremi");
shouldBeEqualToString("new HashChangeEvent('eventType', { bubbles: true, cancelable: true, oldURL: 'doremi', newURL: 'andre' }).newURL", "andre");
</script>
</body>
</html>